Cyano-bridged organotin compounds. Crystal structure of a trinuclear dianion containing a nearly linear array of nine atoms

Abstract

The use of PPN⁺[PPN⁺=(Ph₃P)₂N⁺] instead of K⁺ as counter-cation for cyanometallate anions, permits variation of the reactivity of the latter species towards electrophilic compounds such as organotin halides; an unusual trinuclear dianion [(Ph₃SnCl)₂(µ-NC)₂Fe(CN)₂(dmso)₂]^2–(dmso = dimethyl sulphoxide) has been obtained in this way, instead of the polymeric material produced by the corresponding potassium cyanoferrate.